1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.util.servlet.filters;
24  
25  import com.liferay.portal.kernel.servlet.HttpHeaders;
26  import com.liferay.portal.kernel.util.ByteArrayMaker;
27  import com.liferay.util.servlet.Header;
28  
29  import java.io.IOException;
30  import java.io.OutputStreamWriter;
31  import java.io.PrintWriter;
32  
33  import java.util.ArrayList;
34  import java.util.HashMap;
35  import java.util.List;
36  import java.util.Map;
37  
38  import javax.servlet.ServletOutputStream;
39  import javax.servlet.http.HttpServletResponse;
40  import javax.servlet.http.HttpServletResponseWrapper;
41  
42  /**
43   * <a href="CacheResponse.java.html"><b><i>View Source</i></b></a>
44   *
45   * @author Alexander Chow
46   */
47  public class CacheResponse extends HttpServletResponseWrapper {
48  
49      public CacheResponse(HttpServletResponse response, String encoding) {
50          super(response);
51  
52          _encoding = encoding;
53      }
54  
55      public void addDateHeader(String name, long value) {
56          List<Header> values = _headers.get(name);
57  
58          if (values == null) {
59              values = new ArrayList<Header>();
60  
61              _headers.put(name, values);
62          }
63  
64          Header header = new Header();
65  
66          header.setType(Header.DATE_TYPE);
67          header.setDateValue(value);
68  
69          values.add(header);
70      }
71  
72      public void addHeader(String name, String value) {
73          List<Header> values = _headers.get(name);
74  
75          if (values == null) {
76              values = new ArrayList<Header>();
77  
78              _headers.put(name, values);
79          }
80  
81          Header header = new Header();
82  
83          header.setType(Header.STRING_TYPE);
84          header.setStringValue(value);
85  
86          values.add(header);
87  
88          if (name.equals(HttpHeaders.CONTENT_TYPE)) {
89              _contentType = value;
90          }
91      }
92  
93      public void addIntHeader(String name, int value) {
94          List<Header> values = _headers.get(name);
95  
96          if (values == null) {
97              values = new ArrayList<Header>();
98  
99              _headers.put(name, values);
100         }
101 
102         Header header = new Header();
103 
104         header.setType(Header.INTEGER_TYPE);
105         header.setIntValue(value);
106 
107         values.add(header);
108     }
109 
110     public int getBufferSize() {
111         return _bufferSize;
112     }
113 
114     public String getHeader(String name) {
115         List<Header> values = _headers.get(name);
116 
117         if ((values == null) || values.isEmpty()) {
118             return null;
119         }
120 
121         Header header = values.get(0);
122 
123         return header.toString();
124     }
125 
126     public void finishResponse() {
127         try {
128             if (_writer != null) {
129                 _writer.close();
130             }
131             else if (_stream != null) {
132                 _stream.close();
133             }
134         }
135         catch (IOException e) {
136         }
137     }
138 
139     public void flushBuffer() throws IOException {
140         if (_stream != null) {
141             _stream.flush();
142         }
143     }
144 
145     public String getContentType() {
146         return _contentType;
147     }
148 
149     public byte[] getData() {
150         finishResponse();
151 
152         return _bam.toByteArray();
153     }
154 
155     public Map<String, List<Header>> getHeaders() {
156         return _headers;
157     }
158 
159     public ServletOutputStream getOutputStream() {
160         if (_writer != null) {
161             throw new IllegalStateException();
162         }
163 
164         if (_stream == null) {
165             _stream = createOutputStream();
166         }
167 
168         return _stream;
169     }
170 
171     public PrintWriter getWriter() throws IOException {
172         if (_writer != null) {
173             return _writer;
174         }
175 
176         if (_stream != null) {
177             throw new IllegalStateException();
178         }
179 
180         _stream = createOutputStream();
181 
182         _writer = new PrintWriter(new OutputStreamWriter(
183             //_stream, _res.getCharacterEncoding()));
184             _stream, _encoding));
185 
186         return _writer;
187     }
188 
189     public boolean isCommitted() {
190         if (_writer != null) {
191             return true;
192         }
193 
194         if ((_stream != null) && _stream.isClosed()) {
195             return true;
196         }
197 
198         return super.isCommitted();
199     }
200 
201     public void setBufferSize(int bufferSize) {
202         _bufferSize = bufferSize;
203     }
204 
205     public void setContentType(String contentType) {
206         _contentType = contentType;
207 
208         super.setContentType(contentType);
209     }
210 
211     public void setDateHeader(String name, long value) {
212         List<Header> values = new ArrayList<Header>();
213 
214         _headers.put(name, values);
215 
216         Header header = new Header();
217 
218         header.setType(Header.DATE_TYPE);
219         header.setDateValue(value);
220 
221         values.add(header);
222     }
223 
224     public void setHeader(String name, String value) {
225         List<Header> values = new ArrayList<Header>();
226 
227         _headers.put(name, values);
228 
229         Header header = new Header();
230 
231         header.setType(Header.STRING_TYPE);
232         header.setStringValue(value);
233 
234         values.add(header);
235     }
236 
237     public void setIntHeader(String name, int value) {
238         List<Header> values = new ArrayList<Header>();
239 
240         _headers.put(name, values);
241 
242         Header header = new Header();
243 
244         header.setType(Header.INTEGER_TYPE);
245         header.setIntValue(value);
246 
247         values.add(header);
248     }
249 
250     protected CacheResponseStream createOutputStream() {
251         return new CacheResponseStream(_bam);
252     }
253 
254     private String _encoding;
255     private ByteArrayMaker _bam = new ByteArrayMaker();
256     private CacheResponseStream _stream;
257     private PrintWriter _writer;
258     private int _bufferSize;
259     private String _contentType;
260     private Map<String, List<Header>> _headers =
261         new HashMap<String, List<Header>>();
262 
263 }